RATIS-969. Add flatbuffers to Ratis thirdparty.
diff --git a/misc/pom.xml b/misc/pom.xml
index 6620e9b..526d61c 100644
--- a/misc/pom.xml
+++ b/misc/pom.xml
@@ -40,6 +40,16 @@
       <version>${shaded.grpc.version}</version>
     </dependency>
     <dependency>
+      <groupId>com.google.flatbuffers</groupId>
+      <artifactId>flatbuffers-java</artifactId>
+      <version>${shaded.flatbuffers.version}</version>
+    </dependency>
+    <dependency>
+      <groupId>com.google.flatbuffers</groupId>
+      <artifactId>flatbuffers-java-grpc</artifactId>
+      <version>${shaded.flatbuffers.version}</version>
+    </dependency>
+    <dependency>
       <groupId>io.grpc</groupId>
       <artifactId>grpc-stub</artifactId>
       <version>${shaded.grpc.version}</version>
@@ -139,6 +149,10 @@
                   <shadedPattern>${ratis.thirdparty.shaded.prefix}.io.grpc</shadedPattern>
                 </relocation>
                 <relocation>
+                  <pattern>com.google.flatbuffers</pattern>
+                  <shadedPattern>${ratis.thirdparty.shaded.prefix}.com.google.flatbuffers</shadedPattern>
+                </relocation>
+                <relocation>
                   <pattern>io.netty</pattern>
                   <shadedPattern>${ratis.thirdparty.shaded.prefix}.io.netty</shadedPattern>
                 </relocation>
diff --git a/misc/src/main/appended-resources/META-INF/NOTICE b/misc/src/main/appended-resources/META-INF/NOTICE
index 9cd2f8f..35a21e1 100644
--- a/misc/src/main/appended-resources/META-INF/NOTICE
+++ b/misc/src/main/appended-resources/META-INF/NOTICE
@@ -21,3 +21,9 @@
 This product bundles Gson which includes the following text:
 
 Copyright 2008 Google Inc.
+
+---
+
+This product bundles flatbuffers-java which includes the following text:
+
+Copyright 2014 Google Inc.
diff --git a/pom.xml b/pom.xml
index f3962f1..9fc7371 100644
--- a/pom.xml
+++ b/pom.xml
@@ -73,6 +73,8 @@
     <shaded.netty.version>4.1.48.Final</shaded.netty.version>
     <!--Version of tcnative to be shaded -->
     <shaded.netty.tcnative.version>2.0.28.Final</shaded.netty.tcnative.version>
+    <!--Version of flatbuffers to be shaded -->
+    <shaded.flatbuffers.version>1.11.0</shaded.flatbuffers.version>
 
     <io.opencensus.version>0.21.0</io.opencensus.version>
     <ratis.thirdparty.shaded.prefix>org.apache.ratis.thirdparty</ratis.thirdparty.shaded.prefix>